Painting raw steel and raw aluminum -

LinkBack Thread Tools
post #1 of 5 Old 11-05-2013, 09:05 PM Thread Starter
Registered User
Join Date: Aug 2012
Posts: 468
Painting raw steel and raw aluminum

I purchased metal cloak front fenders (steel with a aluminum inner fender)
Poison spider rock sliders
Smitybuilt corner guards (I removed the powder coating)

What's a good way to prep the metals for paint? What type of primer should I use?

It will be painted hummer yellow most likely single stage.

Thanks I just don't want to paint this and have the paint flake off in a year.

Sent from Free App

nixer600 is offline  
Sponsored Links
post #2 of 5 Old 11-06-2013, 04:06 AM
Registered User
5-90's Avatar
1988 XJ Cherokee 
Join Date: Sep 2006
Location: San Jose, CA
Posts: 5,343
Sand metal to remove any tool marks. 180g is acceptable, 240g is better. 320g is overkill for all but exotic paint jobs.

Use a good primer - a good etching primer is better. Allow 24-48 hours for primer to cure.

Use quality colour coat. A primer alone will not prevent rust! Recall that primer is a porous coat, in order to help the paint adhere to the metal surface. Several light coats will always be better than one heavy coat - follow the paint's instructions for multiple coats. Allow 24-48 hours for final cure.

Clearcoat if desired, it's usually advisable. A light wet-sand with something like 600-grit is helpful for if you want to bring out the shine, else don't bother. Follow similar instructions as for the colour coat.

But, consider the use of primer to be mandatory Getting a good colour coat to stick to bare metal ain't gonna happen - and that's going to fair guarantee your "flaking off in a year" concerns (it probably won't even last a year. More like three months. Maybe.)

"recon" (sic - reckon)(tm) "hihgly"(tm) "seceed"(tm)
"Outback AIDS - Alcohol-Induced Dizzy Spells"
5-90 is offline  
post #3 of 5 Old 11-06-2013, 06:51 AM Thread Starter
Registered User
Join Date: Aug 2012
Posts: 468
Thanks allot. That covered all I needed to know.

Sent from Free App
nixer600 is offline  
post #4 of 5 Old 11-06-2013, 08:51 AM
Registered User
2012 JK Wrangler 
Join Date: Sep 2011
Location: Lake Havasu City
Posts: 6,056
you can use a non-sanding self etching primer too, to skip the full dry out and re-sand of the primer. follow the instrcutions though if you let it dry to long it will need sanding anyway.

after sanding the metal and its cleaned i have used metal prep it was kind of a alcohol and acid. just wipped it on and the metal reacted by bluing, this keeps the unseen surface rust from getting a hold, bare metal will start to rust the day it was made, exposed to air/oxygen. the things i have done that way seem to have lasted a life time. paint was/is hard as nails. but it was all Imron and then it was all lead too.

prep is everything.
222Doc is offline  
post #5 of 5 Old 11-07-2013, 03:49 PM
Caveman Chemist
magnetman's Avatar
2011 JK Wrangler 
Join Date: Oct 2009
Location: Cullman
Posts: 11,364
Not a big fan of etch primers. They were much better in the past vs current products

Use a 2 part epoxy primer for best adhesion and corrosion resistance.
magnetman is offline  

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome